Spinneret for preparing reinforced hollow fiber membrane, membrane manufacturing method and hollow fiber membrane

A spinneret and fiber membrane technology, which is applied in the field of hollow fiber membrane preparation, can solve the problems of difficult to control precoating liquid seepage, difficult operation and high cost

Active Publication Date: 2021-03-23
JIANGSU KAIMI MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of liquid feed liquid in the pretreatment area by this method cannot completely avoid the problem of seepage. At the same time, for the gaseous pretreatment liquid, the pretreatment liquid needs to be vaporized in advance, which makes the operation difficult and the equipment cost is high.
[0006] In summary, in the prior art, it is difficult to control the seepage of the pre-coating solution for the pre-treatment of the braided pipe coated with dilute solution, and there are problems such as complex equipment, high cost, and difficult operation

Method used

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  • Spinneret for preparing reinforced hollow fiber membrane, membrane manufacturing method and hollow fiber membrane
  • Spinneret for preparing reinforced hollow fiber membrane, membrane manufacturing method and hollow fiber membrane
  • Spinneret for preparing reinforced hollow fiber membrane, membrane manufacturing method and hollow fiber membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0032] refer to Figure 1-3 , the spinneret for preparing reinforced hollow fiber membranes of the present invention comprises a coating spinneret and a pre-coating device arranged on the top of the first coating spinneret, and the primary coating spinneret includes passing through the rope hole 22 successively Connected baffle plate 3 , primary distribution plate 4 , secondary distribution plate 5 and bottom plate 6 .

[0033] The pre-coating device includes a cover plate 1 and a pre-coating chamber 2 located below the cover plate 1. The bottom of the wall of the pre-coating chamber 2 is set on the baffle plate 3; The hole 8 and the air inlet hole 8 are symmetrically distributed on both sides of the rope hole 22. The inner radial direction of the air inlet hole 8 gradually becomes larger and an air inlet 11 is formed on the upper surface of the cover plate, and the air inlet 11 is connected to the air compressor. . Two atomizing holes 7 leading to the precoating chamber 2 a...

Embodiment 2

[0043] The method for preparing reinforced hollow fiber membrane using spinneret of the present invention comprises the following steps:

[0044] Support tube pretreatment: the support tube is passed through the threading hole 22 of the spinneret of the present invention, the coating liquid is supplied to the liquid inlet hole 24 by a metering pump, and the high-speed airflow is supplied to the air inlet hole 8 by an air compressor. Spinneret atomization holes 9 meet and are atomized and sprayed into the pre-coating cavity 2, evenly wetting the surface of the support tube;

[0045] Hollow fiber membrane preparation: the pretreated support tube is coated with casting solution, and then immersed in a coagulation bath for phase inversion to obtain a reinforced hollow fiber membrane.

[0046] Figure 4 It is a flow chart of the film making process of the present invention. In this embodiment, the support body is woven or knitted from polyester fiber filaments, the weaving densit...

Embodiment 3

[0054] In Example 2, the composition ratio in the coating liquid is set to PMMA:NMP=15:85, the feed rate of the coating liquid is set to 10 ml / min, the compressed air is set to 0.2MPa, except Otherwise, the operation was carried out in the same manner as in Example 2 to obtain a reinforced hollow fiber membrane 2 comprising a reinforcing layer, a coupling layer, and a separation layer connected from the inside to the outside.

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Abstract

The invention discloses a spinneret for preparing an enhanced hollow fiber membrane and a membrane preparation method. The spinneret comprises a primary coating spinneret. A pre-coating device is arranged on the baffle of the primary coating spinneret; the pre-coating device comprises a cover plate and a pre-coating cavity arranged below the cover plate; the bottom of the cavity wall of the pre-coating cavity is arranged on the baffle; an air inlet hole is arranged in the cover plate; an atomizing hole is arranged in the surface in contact with the cover plate of the pre-coating cavity; the atomizing hole is communicated with the air inlet hole; a liquid inlet hole is arranged in the cavity wall of the pre-coating cavity; a gas-liquid discharge hole is arranged in the lower part of the pre-coating cavity; a liquefied droplet leakage-proof table is arranged at the bottom of the pre-coating cavity on the baffle, a positioning hole and a fixing hole are arranged in the cover plate and thewall of the pre-coating cavity in the thickness direction respectively, a rope penetrating hole is arranged in the middle of the cover plate and in the top of the leakage-proof table respectively, and the positioning hole, the fixing hole and the rope penetrating hole correspond to the positioning hole, the fixing hole and the rope penetrating hole respectively of the primary coating spinneret. The enhanced hollow fiber membrane with super-strong falling resistance and high bursting strength can be prepared.

Description

technical field [0001] The invention relates to the technical field of hollow fiber membrane preparation, in particular to a spinneret for preparing a reinforced hollow fiber membrane, a membrane making method and the membrane. Background technique [0002] With the continuous innovation of science and technology, the continuous improvement of the level of industrialization, the acceleration of urbanization, and the continuous improvement of people's living standards, the pollution of China's water environment has become increasingly serious. Therefore, membrane filtration technology with simple operation and energy saving is gradually occupying an important position in the field of water treatment. At present, the traditional biological treatment method with poor effluent quality, large floor area, long treatment period, and low impact load can no longer meet the high standard requirements of water treatment. The membrane technology combined with activated sludge treatment ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D4/02D04H1/4374D04H1/76
CPCD01D4/02D04H1/4374D04H1/76
Inventor 徐晓璇关晓琳王怀林
Owner JIANGSU KAIMI MEMBRANE TECH
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